//========= Copyright Valve Corporation, All rights reserved. ============//

//

// Purpose:

//

//===========================================================================//

#ifndef TIER0_ICOMMANDLINE_H

#define TIER0_ICOMMANDLINE_H

#ifdef _WIN32

#pragma once

#endif

#include "tier0/platform.h"

//-----------------------------------------------------------------------------

// Purpose: Interface to engine command line

//-----------------------------------------------------------------------------

abstract_class ICommandLine

{

public:

virtual void CreateCmdLine( const char *commandline ) = 0;

virtual void CreateCmdLine( int argc, char **argv ) = 0;

virtual const char *GetCmdLine( void ) const = 0;

// Check whether a particular parameter exists

virtual const char *CheckParm( const char *psz, const char **ppszValue = 0 ) const = 0;

virtual void RemoveParm( const char *parm ) = 0;

virtual void AppendParm( const char *pszParm, const char *pszValues ) = 0;

// Returns the argument after the one specified, or the default if not found

virtual const char *ParmValue( const char *psz, const char *pDefaultVal = 0 ) const = 0;

virtual int ParmValue( const char *psz, int nDefaultVal ) const = 0;

virtual float ParmValue( const char *psz, float flDefaultVal ) const = 0;

// Gets at particular parameters

virtual int ParmCount() const = 0;

virtual int FindParm( const char *psz ) const = 0; // Returns 0 if not found.

virtual const char* GetParm( int nIndex ) const = 0;

// copies the string passwed

virtual void SetParm( int nIndex, char const *pNewParm ) =0;

virtual const char *ParmValueByIndex( int nIndex, const char *pDefaultVal = 0 ) const = 0;

};

//-----------------------------------------------------------------------------

// Gets a singleton to the commandline interface

// NOTE: The #define trickery here is necessary for backwards compat:

// this interface used to lie in the vstdlib library.

//-----------------------------------------------------------------------------

PLATFORM_INTERFACE ICommandLine *CommandLine_Tier0();

#if !defined( VSTDLIB_BACKWARD_COMPAT )

#define CommandLine CommandLine_Tier0

#endif

#endif // TIER0_ICOMMANDLINE_H